Louisville

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California Chrome, winner of the 140th Kentucky Derby, walks the shed row with assistant trainer Alan Sherman at Churchill Downs in Louisville, Ky., Sunday, May 4, 2014. (AP Photo/Garry Jones)

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Trainer Art Sherman, center, speaks to the media about Kentucky Derby 140 winner California Chrome, outside Barn 20 at Churchill Downs in Louisville, Ky., Sunday, May 4, 2014. (AP Photo/Garry Jones)

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Kentucky Derby winning trainer Art Sherman talks about California Chrome's victory at Churchill Downs in Louisville, Ky., Sunday, May 4, 2014. (AP Photo/Garry Jones)

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Kentucky Derby winner California Chrome looks out of his stall at Churchill Downs in Louisville, Ky., Sunday, May 4, 2014. (AP Photo/Garry Jones)

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Victor Espinoza and trainer Art Sherman celebrate after Espinoza rode California Chrome to a victory in the 140th running of the Kentucky Derby horse race at Churchill Downs Saturday, May 3, 2014, in Louisville, Ky. (AP Photo/Garry Jones)